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Why is Haskell code full of $ signs?

someFunction $ anotherFunction $ aThirdFunction argument

Answer¶

Read this as:

someFunction (anotherFunction (aThirdFunction argument))

In other words, everything to the right of any $ is the argument of everything to the left.

It is popular as a way to avoid excessive brackets. See here for more. See also this Stack Overflow question.

Last update: January 23, 2023
Created: January 18, 2023